Silence some annoying warnings when doing full build with strict flags

This mainly touches extern libraries and few debug-only places in intern.

Some summary:

- External libraries are not strict at all about missing declarations,
  so we can rather safely remove such warning together with other strict
  flags.

- Bullet has some static functions which are not used.
  Those were commented out.

- Carve now has some unused debug-only functions commented out as well.
  While we're on the way of getting rid of Carve, it makes sense to make
  things a bit cleaner for the time being.

- In LZMA we have some parts disabled which gives some set but unused
  variables which is rather correct.

- Elbeem had quite some variables set and never used because their usage
  is inside of debug-only code which is commented out.

Note about patching upstream libraries: surely one might say that we
have to make local patchset against this, but own experience says it
only gives extra work trying to merge such tweaks to a new upstream
version and usually it's just faster to re-apply such fixes again after
bundling new upstream library.

3 files changed, 9 insertions, 6 deletions

diff --git a/extern/bullet2/src/BulletDynamics/Featherstone/btMultiBody.cpp b/extern/bullet2/src/BulletDynamics/Featherstone/btMultiBody.cpp
index e49cf30d044..aea8c683732 100644
--- a/extern/bullet2/src/BulletDynamics/Featherstone/btMultiBody.cpp
+++ b/extern/bullet2/src/BulletDynamics/Featherstone/btMultiBody.cpp
@@ -51,6 +51,7 @@ namespace {
         bottom_out = -displacement.cross(top_out) + rotation_matrix * bottom_in;
     }
 
+/*
     void InverseSpatialTransform(const btMatrix3x3 &rotation_matrix,
                                  const btVector3 &displacement,
                                  const btVector3 &top_in,
@@ -80,6 +81,7 @@ namespace {
 		top_out = a_top.cross(b_top);
 		bottom_out = a_bottom.cross(b_top) + a_top.cross(b_bottom);
 	}
+*/
 }
 
 
diff --git a/extern/bullet2/src/BulletSoftBody/btSoftBodyHelpers.cpp b/extern/bullet2/src/BulletSoftBody/btSoftBodyHelpers.cpp
index 293a393e55e..d96f85ec630 100644
--- a/extern/bullet2/src/BulletSoftBody/btSoftBodyHelpers.cpp
+++ b/extern/bullet2/src/BulletSoftBody/btSoftBodyHelpers.cpp
@@ -1127,6 +1127,7 @@ int								nattrb=0;
 int								hasbounds=0;
 int result = sscanf(node,"%d %d %d %d",&nnode,&ndims,&nattrb,&hasbounds);
 result = sscanf(node,"%d %d %d %d",&nnode,&ndims,&nattrb,&hasbounds);
+(void)result;
 node += nextLine(node);
 
 pos.resize(nnode);
@@ -1208,10 +1209,10 @@ if(ele&&ele[0])
 			}
 		}
 	}
-printf("Nodes:  %u\r\n",psb->m_nodes.size());
-printf("Links:  %u\r\n",psb->m_links.size());
-printf("Faces:  %u\r\n",psb->m_faces.size());
-printf("Tetras: %u\r\n",psb->m_tetras.size());
+printf("Nodes:  %d\r\n",psb->m_nodes.size());
+printf("Links:  %d\r\n",psb->m_links.size());
+printf("Faces:  %d\r\n",psb->m_faces.size());
+printf("Tetras: %d\r\n",psb->m_tetras.size());
 return(psb);
 }
 
diff --git a/extern/bullet2/src/BulletSoftBody/btSoftBodyInternals.h b/extern/bullet2/src/BulletSoftBody/btSoftBodyInternals.h
index 759509a1d86..1b9d02d79f9 100644
--- a/extern/bullet2/src/BulletSoftBody/btSoftBodyInternals.h
+++ b/extern/bullet2/src/BulletSoftBody/btSoftBodyInternals.h
@@ -422,7 +422,7 @@ static inline btVector3		BaryCoord(	const btVector3& a,
 }
 
 //
-static btScalar				ImplicitSolve(	btSoftBody::ImplicitFn* fn,
+static inline btScalar				ImplicitSolve(	btSoftBody::ImplicitFn* fn,
 										  const btVector3& a,
 										  const btVector3& b,
 										  const btScalar accuracy,
@@ -504,7 +504,7 @@ static inline btScalar		VolumeOf(	const btVector3& x0,
 }
 
 //
-static void					EvaluateMedium(	const btSoftBodyWorldInfo* wfi,
+static inline void					EvaluateMedium(	const btSoftBodyWorldInfo* wfi,
 										   const btVector3& x,
 										   btSoftBody::sMedium& medium)
 {