Changed some asserts to warnings

svn-id: r50175

3 files changed, 14 insertions, 4 deletions

diff --git a/engines/m4/assets.cpp b/engines/m4/assets.cpp
index 1f3cf278ae..c329373add 100644
--- a/engines/m4/assets.cpp
+++ b/engines/m4/assets.cpp
@@ -320,7 +320,12 @@ void SpriteAsset::loadFrameHeader(SpriteAssetFrame &frameHeader, bool isBigEndia
 }
 
 M4Sprite *SpriteAsset::getFrame(int frameIndex) {
-	return _frames[frameIndex].frame;
+	if ((uint)frameIndex < _frames.size()) {
+		return _frames[frameIndex].frame;
+	} else {
+		warning("SpriteAsset::getFrame: Invalid frame %d, out of %d", frameIndex, _frames.size());
+		return _frames[_frames.size() - 1].frame;
+	}
 }
 
 void SpriteAsset::loadStreamingFrame(M4Sprite *frame, int frameIndex, int destX, int destY) {
diff --git a/engines/m4/graphics.cpp b/engines/m4/graphics.cpp
index b0bc8bbc0c..85d138328d 100644
--- a/engines/m4/graphics.cpp
+++ b/engines/m4/graphics.cpp
@@ -920,8 +920,10 @@ void M4Surface::translate(RGBList *list, bool isTransparent) {
 
 	for (int i = 0; i < width() * height(); ++i, ++p) {
 		if (!isTransparent || (*p != TRANSPARENT_COLOUR_INDEX)) {
-			assert(*p < list->size());
-			*p = palIndexes[*p];
+			if (*p < list->size()) {
+				warning("Pal pointer exceeds list size");
+				*p = palIndexes[*p];
+			}
 		}
 	}
 
diff --git a/engines/m4/sprite.cpp b/engines/m4/sprite.cpp
index 553b27dd9a..55de6714d1 100644
--- a/engines/m4/sprite.cpp
+++ b/engines/m4/sprite.cpp
@@ -182,7 +182,10 @@ void M4Sprite::loadMadsSprite(Common::SeekableReadStream* source) {
 		// Check if we need to scan forward to find the end of the line
 		if (!newLine) {
 			do {
-				assert(!source->eos());
+				if (source->eos()) {
+					warning("M4Sprite::loadMadsSprite: unexpected end of data");
+					break;
+				}
 			} while (source->readByte() != 0xff);
 		}
 	}