display: Remove klockwork warnings and errors.

Remove all klockwork warnings and errors for libgralloc,
libhwcomposer, liboverlay, libqdutils, libqservice, libvirtual,
libexternal libraries to avoid buffer overflow and memory leaks.

Change-Id: I078143bcbcf5e4b342156bd8305a644566f7cc4b

libgralloc/alloc_controller.cpp

@@ -566,9 +566,7 @@ void getBufferAttributes(int width, int height, int format, int usage,
             tileEnabled,
             alignedw,
             alignedh);
-
-    if(size)
-        size = getSize(format, width, height, alignedw, alignedh);
+    size = getSize(format, width, height, alignedw, alignedh);
 }