fixed crash for missing environment variable w/ steam version

.gitignore

@@ -0,0 +1,3 @@
+
+JKJALaunch.xcodeproj/project.xcworkspace/*
+JKJALaunch.xcodeproj/xcuserdata/*

JKJALaunch-Info.plist

@@ -21,11 +21,11 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.2</string>
+	<string>1.2.1</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>9</string>
+	<string>10</string>
 	<key>LSMinimumSystemVersion</key>
 	<string>${MACOSX_DEPLOYMENT_TARGET}</string>
 	<key>NSMainNibFile</key>

patchapp.c

@@ -10,7 +10,8 @@
 __attribute__ ((constructor)) void whichProgram( void )
 {
 
-	unsigned char isMPText[3];
+	char isMPText[3];
+	char *envText;
 
 	int isMP = 0;
 
@@ -26,8 +27,13 @@ __attribute__ ((constructor)) void whichProgram( void )
 		mach_vm_protect(mach_task_self(), patchLocation, 2, 0, VM_PROT_EXECUTE | VM_PROT_READ);
 	}
 
-	strncpy(isMPText, getenv("ASPYR_JAMP"), 3);
-	isMP = strncasecmp(isMPText, "NO", 3);
+	envText = getenv("ASPYR_JAMP");
+
+	if (envText != NULL)
+	{
+		strncpy(isMPText, envText, 3);
+		isMP = strncasecmp(isMPText, "NO", 3);
+	}
 
 	//check if we're in a sandbox :/ then mess around with prefs a bit
 	//hacked together with stuff from https://github.com/ole/NSBundle-OBCodeSigningInfo