tdf#39440 cppcheck cleanliness, Fixing basic cpp errors

Initialized a non-initialized integer variable which is widely used in if else

Change-Id: Ibd99c0baa4cd3d4d409310a9a70dc7b421f6a8b2
Reviewed-on: https://gerrit.libreoffice.org/14780Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

desktop/unx/source/file_image_unx.c

@@ -76,7 +76,7 @@ int file_image_pagein (file_image * image)
     long          s;
     size_t        k;
     // force touching of each page despite the optimizer
-    volatile char c = 0;
+    volatile char c =0;
 
     if (image == 0)
         return EINVAL;

rsc/source/rscpp/cpp6.c

@@ -584,7 +584,7 @@ DEFBUF* defendel(char* name, int delete)
     DEFBUF** prevp;
     char* np;
     int nhash;
-    int temp;
+    int temp=0;
     int size;
 
     for (nhash = 0, np = name; *np != EOS;)