oss-fuzz: Replace unicode space with ascii space

Signed-off-by: Cosmin Truta <ctruta@gmail.com>

contrib/oss-fuzz/libpng_read_fuzzer.cc

diff --git a/contrib/oss-fuzz/libpng_read_fuzzer.cc b/contrib/oss-fuzz/libpng_read_fuzzer.cc
index 6d51f73..9afe3c3 100644
--- a/contrib/oss-fuzz/libpng_read_fuzzer.cc
+++ b/contrib/oss-fuzz/libpng_read_fuzzer.cc
@@ -24,7 +24,7 @@
 #include "nalloc.h"
 
 #define PNG_CLEANUP \
-  nalloc_end(); \
+  nalloc_end(); \
   if(png_handler.png_ptr) \
   { \
     if (png_handler.row_ptr) \