Fix usage of uninialized memory in some operations

- FastGaussianBlurValueOperation is a value operation, so use only first vector
  component in initializeTileData.

- Gamma correct/uncorrect operations didn't set alpha for output which lead to
  usage of uninitialzied memory further in nodes graph.

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/compositor/operations/COM_FastGaussianBlurOperation.cpp b/source/blender/compositor/operations/COM_FastGaussianBlurOperation.cpp
index 4bdb2591cb7..2ae80b4f207 100644
--- a/source/blender/compositor/operations/COM_FastGaussianBlurOperation.cpp
+++ b/source/blender/compositor/operations/COM_FastGaussianBlurOperation.cpp
@@ -281,7 +281,7 @@ void *FastGaussianBlurValueOperation::initializeTileData(rcti *rect)
 		if (this->m_overlay == FAST_GAUSS_OVERLAY_MIN) {
 			float *src = newBuf->getBuffer();
 			float *dst = copy->getBuffer();
-			for (int i = copy->getWidth() * copy->getHeight() * COM_NUMBER_OF_CHANNELS; i != 0; i--, src++, dst++) {
+			for (int i = copy->getWidth() * copy->getHeight(); i != 0; i--, src += COM_NUMBER_OF_CHANNELS, dst += COM_NUMBER_OF_CHANNELS) {
 				if (*src < *dst) {
 					*dst = *src;
 				}
@@ -290,7 +290,7 @@ void *FastGaussianBlurValueOperation::initializeTileData(rcti *rect)
 		else if (this->m_overlay == FAST_GAUSS_OVERLAY_MAX) {
 			float *src = newBuf->getBuffer();
 			float *dst = copy->getBuffer();
-			for (int i = copy->getWidth() * copy->getHeight() * COM_NUMBER_OF_CHANNELS; i != 0; i--, src++, dst++) {
+			for (int i = copy->getWidth() * copy->getHeight(); i != 0; i--, src += COM_NUMBER_OF_CHANNELS, dst += COM_NUMBER_OF_CHANNELS) {
 				if (*src > *dst) {
 					*dst = *src;
 				}