Don't use .exe suffix on non Windows

[mrdudz]

The makefile produces an executable with .exe suffix on all platforms - but it should do that only on windows. This fixes it:

diff --git a/src/Makefile b/src/Makefile
index 5bf2f78..b38c3d0 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -14,7 +14,7 @@
 CXX = g++
 #CXX = clang++
 
-EXE = ../IceBroLite.exe
+EXE = ../IceBroLite
 SOURCES = 6510.cpp Breakpoints.cpp C64Colors.cpp Config.cpp Expressions.cpp FileDialog.cpp Files.cpp
 SOURCES += IceBroLite.cpp Icons.cpp Image.cpp ImGui_Helper.cpp Mnemonics.cpp
 SOURCES += Platform.cpp SaveState.coo SourceDebug.cpp StartVice.cpp struse.cpp Sym.cpp
@@ -64,6 +64,7 @@ ifeq ($(findstring MINGW,$(UNAME_S)),MINGW)
 
        CXXFLAGS += `pkg-config --cflags glfw3`
        CFLAGS = $(CXXFLAGS)
+       EXESUFFIX = .exe
 endif
 
 ##---------------------------------------------------------------------
@@ -88,12 +89,12 @@ endif
 %.o:struse/%.cpp
        $(CXX) $(CXXFLAGS) -c -o $@ $<
 
-all: $(EXE)
+all: $(EXE)$(EXESUFFIX)
        @echo Build complete for $(ECHO_MESSAGE)
 
-$(EXE): $(OBJS)
+$(EXE)$(EXESUFFIX): $(OBJS)
        $(CXX) -o $@ $^ $(CXXFLAGS) $(LIBS)
 
 clean:
-       rm -f $(EXE) $(OBJS)
+       rm -f $(EXE)$(EXESUFFIX) $(OBJS)

[Sakrac]

Updated as suggested