Index: trunk/psModules/src/imcombine/pmSubtractionSimple.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionSimple.c	(revision 35784)
+++ trunk/psModules/src/imcombine/pmSubtractionSimple.c	(revision 35814)
@@ -80,19 +80,19 @@
   float chisq = 1.0;
   int convolution_direction = 0;
-  psImage *image1;
-  psImage *mask1;
-  psImage *var1;
-
-  psImage *image2;
-  psImage *mask2;
-  psImage *var2;
-
-  psImage *imageC1;
-  psImage *maskC1;
-  psImage *varC1;
-
-  psImage *imageC2;
-  psImage *maskC2;
-  psImage *varC2;
+  psImage *image1 = NULL;
+  psImage *mask1 = NULL;
+  psImage *var1 = NULL;
+
+  psImage *image2 = NULL;
+  psImage *mask2 = NULL;
+  psImage *var2 = NULL;
+
+  psImage *imageC1 = NULL;
+  psImage *maskC1 = NULL;
+  psImage *varC1 = NULL;
+
+  psImage *imageC2 = NULL;
+  psImage *maskC2 = NULL;
+  psImage *varC2 = NULL;
 
   // Allocate images, as this is usually done by subtractionMatchAlloc after this function is called.