fix from upstream

------------------------------------------------------------------------
r1285 | giraffedata | 2010-09-18 16:13:39 -0400 (Sat, 18 Sep 2010) | 1 line

Fix free of non-allocated memory

Index: converter/ppm/ppmtompeg/param.c
===================================================================
--- converter/ppm/ppmtompeg/param.c	(revision 1284)
+++ converter/ppm/ppmtompeg/param.c	(revision 1285)
@@ -283,8 +283,8 @@ GetFrameRate(const char * const p)
 
 
 static void
-mergeInputSource(struct inputSource * const baseSourceP,
-                 struct inputSource * const addedSourceP) {
+mergeInputSource(struct inputSource *       const baseSourceP,
+                 const struct inputSource * const addedSourceP) {
 
     unsigned int i;
 
@@ -294,12 +294,6 @@ mergeInputSource(struct inputSource * co
     for (i = 0; i < addedSourceP->numInputFileEntries; ++i)
         baseSourceP->inputFileEntries[baseSourceP->numInputFileEntries++] =
             addedSourceP->inputFileEntries[i];
-
-    free(addedSourceP);
-    /* Note the space allocated for the *addedSourceP input file
-       entries themselves is still allocated, and used by 
-       *baseSourceP.
-    */
 }