Handling reading arm executable.

 Because CPU_TYPE_ARM is not defined on Mac OSX 10.4, I have to redefine the
variable to the correct value.
Review URL: http://breakpad.appspot.com/310004

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@867 4c0a9323-5329-0410-9bdc-e9ce6186880e
diff --git a/src/common/mac/macho_reader.cc b/src/common/mac/macho_reader.cc
index ff16bc6..f1f0a17 100644
--- a/src/common/mac/macho_reader.cc
+++ b/src/common/mac/macho_reader.cc
@@ -38,6 +38,11 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+// Unfortunately, CPU_TYPE_ARM is not define for 10.4.
+#if !defined(CPU_TYPE_ARM)
+#define CPU_TYPE_ARM 12
+#endif
+
 namespace google_breakpad {
 namespace mach_o {
 
@@ -230,6 +235,7 @@
     uint32_t expected_magic;
     // validate that magic matches the expected cpu type
     switch (expected_cpu_type) {
+      case CPU_TYPE_ARM:
       case CPU_TYPE_I386:
         expected_magic = MH_CIGAM;
         break;